In ancient times, the northern part of the Indian subcontinent and large areas south of the Himalayas were ruled by the Kirats. This is history before the arrival of the Aryans in this land. And roughly it indicates a history of 3000-4000 years ago. British writer, Eden Vansittart writes in his book, "Notes on Nepal" about the antiquity of this Kirant descendants in this region are as bellows:

"…..In the same manner the tribes inhabiting Kiranta of the regions between Dudhkoshi and the Arun, are called Kiranta, which name is as old as that of the great Hindu deity Mahadeva. The Kirant of the north now called Khambu and the Limbu of the south allied tribes, intermarrying among themselves."(Vansittart,1896:133)

History has confirmed that many generations of Kirat kings, including Yalambar, ruled the Kathmandu Valley as well. About 800 years before BC, King Yalambar established Kirant kingdom over Kathmandu Valley from Simanggadh and started the Kirat rule. Later, over a long period of time, the Kirats were defeated by other dynasty rulers. Then, with the rise of Prithvi Narayan Shah in Bikram Sambat 1723 (1780 A.D), the Kirats of the valley moved to other safe places.

Apart from the Kirats of the valley, the Kirat caste seems to have an equally ancient history in eastern Nepal. 500 years before BC, under the leadership of Lukthuyo, a Kirat caste warrior who separated from Simanggarh, he crossed the Bijuk River and established a kingdom in Fedap Laje. Over time, this area came to be known as Limbuwan area.

It is observed that the boundaries of the Limbuwan region have been shifting up and down throughout history, as the rulers of the time have adjusted them for tax collection and to establish strategic strongholds, as well as to accommodate their armies. Concurrently, within the Limbuwan region, the division into Thums (administrative units) has varied over different time periods, and the number of Thums has been found to be relatively higher at later.

In relation to the boundaries of Limbuwan land, it is found that in the early period, it was from the Himalayan section in the north to the Arun River and Saptakoshi in the west, including Sikkim in the east. After the victory of MungMawarong king in Limbuwan land around AD 700, the border of this land seems to have reached Jalalgarh near Purnia in present day India in the south, but later when the Shah Dynasty kings established the border of this Limbuwan land, it is found that the place called Simalbhude was established as the southern border between Lakh and Fire line on the border of Haraicha in Morang.

Choubise is a small territory of Limbuwan region. Different authors have different opinions about how the name of this region came to be Choubise. The "Lalmohar" (Red seals) issued by king Surendra Bikram Shah on 9th of Magh, 1917 Bikram Samvat (1974 AD) appear to have the word "Pallo Kirat" and the terms "Wallao Kirat", "Majh Kirat" and "Pallo Kirat" are used from this period. "Pallo Kirant means Limbuwan region. In the year 1792, King Ran Bahadur Shah divided this Limbuwan land into 17 Thums (17 administrative areas). And among the seventeen there was one "Chaubise".

Cheshwihang, the descendants of eight-kings of Phedap around the 5th century, and "Saiyok Ladohang" (Laido Sanyakhang), the famous king of the Sanyak dynasty of Chaubise, ruled this land in the 8th century. During the reign of Buddhikarna, king of Bijayapur, the land of Sikkim was separated from Limbuwan.

During the Rana dynasty's rule in Nepal, the 17 Thums of Limbuwan was divided into 19 Thums and later it was increased to 23 Thums with the intention of making it easier to collect different taxes. After Bikram Samvat 1831 to 1852 (1888-1909 AD), the Kipat areas which were made suitable fields for cultivation by the Sanyak descendants of Chaubise area, the government of that time decided to settle for "other caste and descendants. The good rice fields of Sanyak's regions had to be handed over to the SreeJanga Paltan (Army group named Sreejanga) for their food and living cost. It includes Dihitar rice field, and the rice field of Chharuwa Khola and Namfuwa Khola of Kiptia Region of Sanyak Limbu.

It is a little difficult to ascertain the exact boundary of Chaibise area of Limbuwan due to the fact that important documents related to the history of Sanyak Limbus and Lalmohar were erased by Jimdar Prem Bahadur Mabo or due to lack of historical documents. But based on the books written by the senior authors and other sources, the borders of Chaubese region based on the boundaries mentioned in the "Lalmohar"(Authority paper) provided by the Gorkhali King Rajendra Bikram Shah to Limbu Kings, are as mentioned below:

The area encompassing "Waratappa, Jhalhara, Budhimorang, Khuwaphok, Bodhe, Kurule, Naamphuwa, Mikluk-hill, Kuhikunda, Lechangu, Warekpung, Muktara, Rajapokhari, Chundhunga, Tandi, and Adipur," located east from the "Surya Kund, Hardiyadanda, Mewajung and Koshi-Tambar," north area of "Lungruwa" and southern water-flowing areas of "Hingwanamwa" excluding "Miruwa, Khokuwa, Jharikapalasi, Baggyepapachim, Nisangachhi, Dechhyagachhi, Panbari, and Bijaypur, which have been practicing since the period of Senbanshi.